Samsung C8274X Manuel D’Utilisation

2-3 

ROM Address: 003EH

LSB

MSB

.7

.6

.5

.4

.3

.2

.1

.0

ISP reset vector change enable/disable bit:
0 = OBP reset vector address
1 = Normal vector (address 0100H)

NOTES:
1.   After selecting ISP reset vector address in selecting ISP protection size,  don't select upper than ISP
      area size.
2.   When any values are written in the Smart Option area (003CH-003FH) by LDC instruction, the data of
      the area may be changed but the Smart Option is not affected. The data for Smart Option should be
      written in the Smart Option area (003CH-003FH) by OTP/MTP tools (SPW2 plus single
      programmer, or GW-PRO2 gang programmer).

ISP reset vector address selection bit:
00 = 200H (ISP area size: 256 byte)
01 = 300H (ISP area size: 512 byte)
10 = 500H (ISP area size: 1024 byte)
11 = 900H (ISP area size: 2048 byte)

ISP protection size selection: 

(note)

00 = 256 bytes
01 = 512 bytes
10 = 1024 bytes
11 = 2048 bytes

Not used

ISP protection enable/disable bit:
0 = Enable (not erasable by LDC)
1 = Disable (erasable by LDC)

ROM Address: 003FH

LSB

MSB

.7

.6

.5

.4

.3

.2

.1

.0

Not used

LVR enable/disable bit
(criteria voltage: 2.2V):
0 = Disable LVR
1 = Enable LVR

ROM Address: 003CH

LSB

MSB

.7

.6

.5

.4

.3

.2

.1

.0

Not used

ROM Address: 003DH

LSB

MSB

.7

.6

.5

.4

.3

.2

.1

.0

Not used

These bits should be

always logic "110b".